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1da177e4 LT |
1 | /* |
2 | * dvb_ca.c: generic DVB functions for EN50221 CAM interfaces | |
3 | * | |
4 | * Copyright (C) 2004 Andrew de Quincey | |
5 | * | |
6 | * Parts of this file were based on sources as follows: | |
7 | * | |
8 | * Copyright (C) 2003 Ralph Metzler <rjkm@metzlerbros.de> | |
9 | * | |
10 | * based on code: | |
11 | * | |
12 | * Copyright (C) 1999-2002 Ralph Metzler | |
13 | * & Marcus Metzler for convergence integrated media GmbH | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * as published by the Free Software Foundation; either version 2 | |
18 | * of the License, or (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
28 | * Or, point your browser to http://www.gnu.org/copyleft/gpl.html | |
29 | */ | |
30 | ||
31 | #include <linux/errno.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/moduleparam.h> | |
36 | #include <linux/vmalloc.h> | |
37 | #include <linux/delay.h> | |
ded92846 | 38 | #include <linux/spinlock.h> |
4e57b681 | 39 | #include <linux/sched.h> |
1da177e4 LT |
40 | |
41 | #include "dvb_ca_en50221.h" | |
42 | #include "dvb_ringbuffer.h" | |
43 | ||
44 | static int dvb_ca_en50221_debug; | |
45 | ||
46 | module_param_named(cam_debug, dvb_ca_en50221_debug, int, 0644); | |
47 | MODULE_PARM_DESC(cam_debug, "enable verbose debug messages"); | |
48 | ||
49 | #define dprintk if (dvb_ca_en50221_debug) printk | |
50 | ||
50b447d5 | 51 | #define INIT_TIMEOUT_SECS 10 |
1da177e4 LT |
52 | |
53 | #define HOST_LINK_BUF_SIZE 0x200 | |
54 | ||
55 | #define RX_BUFFER_SIZE 65535 | |
56 | ||
57 | #define MAX_RX_PACKETS_PER_ITERATION 10 | |
58 | ||
59 | #define CTRLIF_DATA 0 | |
60 | #define CTRLIF_COMMAND 1 | |
61 | #define CTRLIF_STATUS 1 | |
62 | #define CTRLIF_SIZE_LOW 2 | |
63 | #define CTRLIF_SIZE_HIGH 3 | |
64 | ||
65 | #define CMDREG_HC 1 /* Host control */ | |
66 | #define CMDREG_SW 2 /* Size write */ | |
67 | #define CMDREG_SR 4 /* Size read */ | |
68 | #define CMDREG_RS 8 /* Reset interface */ | |
69 | #define CMDREG_FRIE 0x40 /* Enable FR interrupt */ | |
70 | #define CMDREG_DAIE 0x80 /* Enable DA interrupt */ | |
71 | #define IRQEN (CMDREG_DAIE) | |
72 | ||
73 | #define STATUSREG_RE 1 /* read error */ | |
74 | #define STATUSREG_WE 2 /* write error */ | |
75 | #define STATUSREG_FR 0x40 /* module free */ | |
76 | #define STATUSREG_DA 0x80 /* data available */ | |
77 | #define STATUSREG_TXERR (STATUSREG_RE|STATUSREG_WE) /* general transfer error */ | |
78 | ||
79 | ||
80 | #define DVB_CA_SLOTSTATE_NONE 0 | |
81 | #define DVB_CA_SLOTSTATE_UNINITIALISED 1 | |
82 | #define DVB_CA_SLOTSTATE_RUNNING 2 | |
83 | #define DVB_CA_SLOTSTATE_INVALID 3 | |
84 | #define DVB_CA_SLOTSTATE_WAITREADY 4 | |
85 | #define DVB_CA_SLOTSTATE_VALIDATE 5 | |
86 | #define DVB_CA_SLOTSTATE_WAITFR 6 | |
87 | #define DVB_CA_SLOTSTATE_LINKINIT 7 | |
88 | ||
89 | ||
90 | /* Information on a CA slot */ | |
91 | struct dvb_ca_slot { | |
92 | ||
93 | /* current state of the CAM */ | |
94 | int slot_state; | |
95 | ||
96 | /* Number of CAMCHANGES that have occurred since last processing */ | |
97 | atomic_t camchange_count; | |
98 | ||
99 | /* Type of last CAMCHANGE */ | |
100 | int camchange_type; | |
101 | ||
102 | /* base address of CAM config */ | |
103 | u32 config_base; | |
104 | ||
105 | /* value to write into Config Control register */ | |
106 | u8 config_option; | |
107 | ||
108 | /* if 1, the CAM supports DA IRQs */ | |
109 | u8 da_irq_supported:1; | |
110 | ||
111 | /* size of the buffer to use when talking to the CAM */ | |
112 | int link_buf_size; | |
113 | ||
1da177e4 LT |
114 | /* buffer for incoming packets */ |
115 | struct dvb_ringbuffer rx_buffer; | |
116 | ||
117 | /* timer used during various states of the slot */ | |
118 | unsigned long timeout; | |
119 | }; | |
120 | ||
121 | /* Private CA-interface information */ | |
122 | struct dvb_ca_private { | |
123 | ||
124 | /* pointer back to the public data structure */ | |
125 | struct dvb_ca_en50221 *pub; | |
126 | ||
127 | /* the DVB device */ | |
128 | struct dvb_device *dvbdev; | |
129 | ||
130 | /* Flags describing the interface (DVB_CA_FLAG_*) */ | |
131 | u32 flags; | |
132 | ||
133 | /* number of slots supported by this CA interface */ | |
134 | unsigned int slot_count; | |
135 | ||
136 | /* information on each slot */ | |
137 | struct dvb_ca_slot *slot_info; | |
138 | ||
139 | /* wait queues for read() and write() operations */ | |
140 | wait_queue_head_t wait_queue; | |
141 | ||
142 | /* PID of the monitoring thread */ | |
143 | pid_t thread_pid; | |
144 | ||
145 | /* Wait queue used when shutting thread down */ | |
146 | wait_queue_head_t thread_queue; | |
147 | ||
148 | /* Flag indicating when thread should exit */ | |
149 | unsigned int exit:1; | |
150 | ||
151 | /* Flag indicating if the CA device is open */ | |
152 | unsigned int open:1; | |
153 | ||
154 | /* Flag indicating the thread should wake up now */ | |
155 | unsigned int wakeup:1; | |
156 | ||
157 | /* Delay the main thread should use */ | |
158 | unsigned long delay; | |
159 | ||
160 | /* Slot to start looking for data to read from in the next user-space read operation */ | |
161 | int next_read_slot; | |
162 | }; | |
163 | ||
164 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca); | |
165 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount); | |
166 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount); | |
167 | ||
168 | ||
169 | /** | |
170 | * Safely find needle in haystack. | |
171 | * | |
172 | * @param haystack Buffer to look in. | |
173 | * @param hlen Number of bytes in haystack. | |
174 | * @param needle Buffer to find. | |
175 | * @param nlen Number of bytes in needle. | |
176 | * @return Pointer into haystack needle was found at, or NULL if not found. | |
177 | */ | |
178 | static u8 *findstr(u8 * haystack, int hlen, u8 * needle, int nlen) | |
179 | { | |
180 | int i; | |
181 | ||
182 | if (hlen < nlen) | |
183 | return NULL; | |
184 | ||
185 | for (i = 0; i <= hlen - nlen; i++) { | |
186 | if (!strncmp(haystack + i, needle, nlen)) | |
187 | return haystack + i; | |
188 | } | |
189 | ||
190 | return NULL; | |
191 | } | |
192 | ||
193 | ||
194 | ||
195 | /* ******************************************************************************** */ | |
196 | /* EN50221 physical interface functions */ | |
197 | ||
198 | ||
199 | /** | |
200 | * Check CAM status. | |
201 | */ | |
202 | static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) | |
203 | { | |
204 | int slot_status; | |
205 | int cam_present_now; | |
206 | int cam_changed; | |
207 | ||
208 | /* IRQ mode */ | |
209 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) { | |
210 | return (atomic_read(&ca->slot_info[slot].camchange_count) != 0); | |
211 | } | |
212 | ||
213 | /* poll mode */ | |
214 | slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); | |
215 | ||
216 | cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; | |
217 | cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; | |
218 | if (!cam_changed) { | |
219 | int cam_present_old = (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE); | |
220 | cam_changed = (cam_present_now != cam_present_old); | |
221 | } | |
222 | ||
223 | if (cam_changed) { | |
224 | if (!cam_present_now) { | |
225 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
226 | } else { | |
227 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; | |
228 | } | |
229 | atomic_set(&ca->slot_info[slot].camchange_count, 1); | |
230 | } else { | |
231 | if ((ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) && | |
232 | (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { | |
233 | // move to validate state if reset is completed | |
234 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
235 | } | |
236 | } | |
237 | ||
238 | return cam_changed; | |
239 | } | |
240 | ||
241 | ||
242 | /** | |
243 | * Wait for flags to become set on the STATUS register on a CAM interface, | |
244 | * checking for errors and timeout. | |
245 | * | |
246 | * @param ca CA instance. | |
247 | * @param slot Slot on interface. | |
248 | * @param waitfor Flags to wait for. | |
249 | * @param timeout_ms Timeout in milliseconds. | |
250 | * | |
251 | * @return 0 on success, nonzero on error. | |
252 | */ | |
253 | static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, | |
254 | u8 waitfor, int timeout_hz) | |
255 | { | |
256 | unsigned long timeout; | |
257 | unsigned long start; | |
258 | ||
259 | dprintk("%s\n", __FUNCTION__); | |
260 | ||
261 | /* loop until timeout elapsed */ | |
262 | start = jiffies; | |
263 | timeout = jiffies + timeout_hz; | |
264 | while (1) { | |
265 | /* read the status and check for error */ | |
266 | int res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
267 | if (res < 0) | |
268 | return -EIO; | |
269 | ||
270 | /* if we got the flags, it was successful! */ | |
271 | if (res & waitfor) { | |
272 | dprintk("%s succeeded timeout:%lu\n", __FUNCTION__, jiffies - start); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | /* check for timeout */ | |
277 | if (time_after(jiffies, timeout)) { | |
278 | break; | |
279 | } | |
280 | ||
281 | /* wait for a bit */ | |
282 | msleep(1); | |
283 | } | |
284 | ||
285 | dprintk("%s failed timeout:%lu\n", __FUNCTION__, jiffies - start); | |
286 | ||
287 | /* if we get here, we've timed out */ | |
288 | return -ETIMEDOUT; | |
289 | } | |
290 | ||
291 | ||
292 | /** | |
293 | * Initialise the link layer connection to a CAM. | |
294 | * | |
295 | * @param ca CA instance. | |
296 | * @param slot Slot id. | |
297 | * | |
298 | * @return 0 on success, nonzero on failure. | |
299 | */ | |
300 | static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) | |
301 | { | |
302 | int ret; | |
303 | int buf_size; | |
304 | u8 buf[2]; | |
305 | ||
306 | dprintk("%s\n", __FUNCTION__); | |
307 | ||
308 | /* we'll be determining these during this function */ | |
309 | ca->slot_info[slot].da_irq_supported = 0; | |
310 | ||
311 | /* set the host link buffer size temporarily. it will be overwritten with the | |
312 | * real negotiated size later. */ | |
313 | ca->slot_info[slot].link_buf_size = 2; | |
314 | ||
315 | /* read the buffer size from the CAM */ | |
316 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SR)) != 0) | |
317 | return ret; | |
318 | if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ / 10)) != 0) | |
319 | return ret; | |
320 | if ((ret = dvb_ca_en50221_read_data(ca, slot, buf, 2)) != 2) | |
321 | return -EIO; | |
322 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) | |
323 | return ret; | |
324 | ||
325 | /* store it, and choose the minimum of our buffer and the CAM's buffer size */ | |
326 | buf_size = (buf[0] << 8) | buf[1]; | |
327 | if (buf_size > HOST_LINK_BUF_SIZE) | |
328 | buf_size = HOST_LINK_BUF_SIZE; | |
329 | ca->slot_info[slot].link_buf_size = buf_size; | |
330 | buf[0] = buf_size >> 8; | |
331 | buf[1] = buf_size & 0xff; | |
332 | dprintk("Chosen link buffer size of %i\n", buf_size); | |
333 | ||
334 | /* write the buffer size to the CAM */ | |
335 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SW)) != 0) | |
336 | return ret; | |
337 | if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10)) != 0) | |
338 | return ret; | |
339 | if ((ret = dvb_ca_en50221_write_data(ca, slot, buf, 2)) != 2) | |
340 | return -EIO; | |
341 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) | |
342 | return ret; | |
343 | ||
344 | /* success */ | |
345 | return 0; | |
346 | } | |
347 | ||
348 | /** | |
349 | * Read a tuple from attribute memory. | |
350 | * | |
351 | * @param ca CA instance. | |
352 | * @param slot Slot id. | |
353 | * @param address Address to read from. Updated. | |
354 | * @param tupleType Tuple id byte. Updated. | |
355 | * @param tupleLength Tuple length. Updated. | |
356 | * @param tuple Dest buffer for tuple (must be 256 bytes). Updated. | |
357 | * | |
358 | * @return 0 on success, nonzero on error. | |
359 | */ | |
360 | static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, | |
361 | int *address, int *tupleType, int *tupleLength, u8 * tuple) | |
362 | { | |
363 | int i; | |
364 | int _tupleType; | |
365 | int _tupleLength; | |
366 | int _address = *address; | |
367 | ||
368 | /* grab the next tuple length and type */ | |
369 | if ((_tupleType = ca->pub->read_attribute_mem(ca->pub, slot, _address)) < 0) | |
370 | return _tupleType; | |
371 | if (_tupleType == 0xff) { | |
372 | dprintk("END OF CHAIN TUPLE type:0x%x\n", _tupleType); | |
373 | *address += 2; | |
374 | *tupleType = _tupleType; | |
375 | *tupleLength = 0; | |
376 | return 0; | |
377 | } | |
378 | if ((_tupleLength = ca->pub->read_attribute_mem(ca->pub, slot, _address + 2)) < 0) | |
379 | return _tupleLength; | |
380 | _address += 4; | |
381 | ||
382 | dprintk("TUPLE type:0x%x length:%i\n", _tupleType, _tupleLength); | |
383 | ||
384 | /* read in the whole tuple */ | |
385 | for (i = 0; i < _tupleLength; i++) { | |
386 | tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, _address + (i * 2)); | |
387 | dprintk(" 0x%02x: 0x%02x %c\n", | |
388 | i, tuple[i] & 0xff, | |
389 | ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); | |
390 | } | |
391 | _address += (_tupleLength * 2); | |
392 | ||
393 | // success | |
394 | *tupleType = _tupleType; | |
395 | *tupleLength = _tupleLength; | |
396 | *address = _address; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | ||
401 | /** | |
402 | * Parse attribute memory of a CAM module, extracting Config register, and checking | |
403 | * it is a DVB CAM module. | |
404 | * | |
405 | * @param ca CA instance. | |
406 | * @param slot Slot id. | |
407 | * | |
408 | * @return 0 on success, <0 on failure. | |
409 | */ | |
410 | static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) | |
411 | { | |
412 | int address = 0; | |
413 | int tupleLength; | |
414 | int tupleType; | |
415 | u8 tuple[257]; | |
416 | char *dvb_str; | |
417 | int rasz; | |
418 | int status; | |
419 | int got_cftableentry = 0; | |
420 | int end_chain = 0; | |
421 | int i; | |
422 | u16 manfid = 0; | |
423 | u16 devid = 0; | |
424 | ||
425 | ||
426 | // CISTPL_DEVICE_0A | |
427 | if ((status = | |
428 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
429 | return status; | |
430 | if (tupleType != 0x1D) | |
431 | return -EINVAL; | |
432 | ||
433 | ||
434 | ||
435 | // CISTPL_DEVICE_0C | |
436 | if ((status = | |
437 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
438 | return status; | |
439 | if (tupleType != 0x1C) | |
440 | return -EINVAL; | |
441 | ||
442 | ||
443 | ||
444 | // CISTPL_VERS_1 | |
445 | if ((status = | |
446 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
447 | return status; | |
448 | if (tupleType != 0x15) | |
449 | return -EINVAL; | |
450 | ||
451 | ||
452 | ||
453 | // CISTPL_MANFID | |
454 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
455 | &tupleLength, tuple)) < 0) | |
456 | return status; | |
457 | if (tupleType != 0x20) | |
458 | return -EINVAL; | |
459 | if (tupleLength != 4) | |
460 | return -EINVAL; | |
461 | manfid = (tuple[1] << 8) | tuple[0]; | |
462 | devid = (tuple[3] << 8) | tuple[2]; | |
463 | ||
464 | ||
465 | ||
466 | // CISTPL_CONFIG | |
467 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
468 | &tupleLength, tuple)) < 0) | |
469 | return status; | |
470 | if (tupleType != 0x1A) | |
471 | return -EINVAL; | |
472 | if (tupleLength < 3) | |
473 | return -EINVAL; | |
474 | ||
475 | /* extract the configbase */ | |
476 | rasz = tuple[0] & 3; | |
477 | if (tupleLength < (3 + rasz + 14)) | |
478 | return -EINVAL; | |
479 | ca->slot_info[slot].config_base = 0; | |
480 | for (i = 0; i < rasz + 1; i++) { | |
481 | ca->slot_info[slot].config_base |= (tuple[2 + i] << (8 * i)); | |
482 | } | |
483 | ||
484 | /* check it contains the correct DVB string */ | |
485 | dvb_str = findstr(tuple, tupleLength, "DVB_CI_V", 8); | |
486 | if (dvb_str == NULL) | |
487 | return -EINVAL; | |
488 | if (tupleLength < ((dvb_str - (char *) tuple) + 12)) | |
489 | return -EINVAL; | |
490 | ||
491 | /* is it a version we support? */ | |
492 | if (strncmp(dvb_str + 8, "1.00", 4)) { | |
493 | printk("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n", | |
494 | ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9], dvb_str[10], dvb_str[11]); | |
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | /* process the CFTABLE_ENTRY tuples, and any after those */ | |
499 | while ((!end_chain) && (address < 0x1000)) { | |
500 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
afd1a0c9 | 501 | &tupleLength, tuple)) < 0) |
1da177e4 LT |
502 | return status; |
503 | switch (tupleType) { | |
504 | case 0x1B: // CISTPL_CFTABLE_ENTRY | |
505 | if (tupleLength < (2 + 11 + 17)) | |
506 | break; | |
507 | ||
508 | /* if we've already parsed one, just use it */ | |
509 | if (got_cftableentry) | |
510 | break; | |
511 | ||
512 | /* get the config option */ | |
513 | ca->slot_info[slot].config_option = tuple[0] & 0x3f; | |
514 | ||
515 | /* OK, check it contains the correct strings */ | |
516 | if ((findstr(tuple, tupleLength, "DVB_HOST", 8) == NULL) || | |
517 | (findstr(tuple, tupleLength, "DVB_CI_MODULE", 13) == NULL)) | |
518 | break; | |
519 | ||
520 | got_cftableentry = 1; | |
521 | break; | |
522 | ||
523 | case 0x14: // CISTPL_NO_LINK | |
524 | break; | |
525 | ||
526 | case 0xFF: // CISTPL_END | |
527 | end_chain = 1; | |
528 | break; | |
529 | ||
530 | default: /* Unknown tuple type - just skip this tuple and move to the next one */ | |
531 | dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", tupleType, | |
532 | tupleLength); | |
533 | break; | |
534 | } | |
535 | } | |
536 | ||
537 | if ((address > 0x1000) || (!got_cftableentry)) | |
538 | return -EINVAL; | |
539 | ||
540 | dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", | |
541 | manfid, devid, ca->slot_info[slot].config_base, ca->slot_info[slot].config_option); | |
542 | ||
543 | // success! | |
544 | return 0; | |
545 | } | |
546 | ||
547 | ||
548 | /** | |
549 | * Set CAM's configoption correctly. | |
550 | * | |
551 | * @param ca CA instance. | |
552 | * @param slot Slot containing the CAM. | |
553 | */ | |
554 | static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) | |
555 | { | |
556 | int configoption; | |
557 | ||
558 | dprintk("%s\n", __FUNCTION__); | |
559 | ||
560 | /* set the config option */ | |
561 | ca->pub->write_attribute_mem(ca->pub, slot, | |
562 | ca->slot_info[slot].config_base, | |
563 | ca->slot_info[slot].config_option); | |
564 | ||
565 | /* check it */ | |
566 | configoption = ca->pub->read_attribute_mem(ca->pub, slot, ca->slot_info[slot].config_base); | |
567 | dprintk("Set configoption 0x%x, read configoption 0x%x\n", | |
568 | ca->slot_info[slot].config_option, configoption & 0x3f); | |
569 | ||
570 | /* fine! */ | |
571 | return 0; | |
572 | ||
573 | } | |
574 | ||
575 | ||
576 | /** | |
577 | * This function talks to an EN50221 CAM control interface. It reads a buffer of | |
578 | * data from the CAM. The data can either be stored in a supplied buffer, or | |
579 | * automatically be added to the slot's rx_buffer. | |
580 | * | |
581 | * @param ca CA instance. | |
582 | * @param slot Slot to read from. | |
583 | * @param ebuf If non-NULL, the data will be written to this buffer. If NULL, | |
584 | * the data will be added into the buffering system as a normal fragment. | |
585 | * @param ecount Size of ebuf. Ignored if ebuf is NULL. | |
586 | * | |
587 | * @return Number of bytes read, or < 0 on error | |
588 | */ | |
589 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount) | |
590 | { | |
591 | int bytes_read; | |
592 | int status; | |
593 | u8 buf[HOST_LINK_BUF_SIZE]; | |
594 | int i; | |
595 | ||
596 | dprintk("%s\n", __FUNCTION__); | |
597 | ||
598 | /* check if we have space for a link buf in the rx_buffer */ | |
599 | if (ebuf == NULL) { | |
600 | int buf_free; | |
601 | ||
1da177e4 | 602 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
603 | status = -EIO; |
604 | goto exit; | |
605 | } | |
606 | buf_free = dvb_ringbuffer_free(&ca->slot_info[slot].rx_buffer); | |
1da177e4 LT |
607 | |
608 | if (buf_free < (ca->slot_info[slot].link_buf_size + DVB_RINGBUFFER_PKTHDRSIZE)) { | |
609 | status = -EAGAIN; | |
610 | goto exit; | |
611 | } | |
612 | } | |
613 | ||
614 | /* check if there is data available */ | |
615 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
616 | goto exit; | |
617 | if (!(status & STATUSREG_DA)) { | |
618 | /* no data */ | |
619 | status = 0; | |
620 | goto exit; | |
621 | } | |
622 | ||
623 | /* read the amount of data */ | |
624 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH)) < 0) | |
625 | goto exit; | |
626 | bytes_read = status << 8; | |
627 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW)) < 0) | |
628 | goto exit; | |
629 | bytes_read |= status; | |
630 | ||
631 | /* check it will fit */ | |
632 | if (ebuf == NULL) { | |
633 | if (bytes_read > ca->slot_info[slot].link_buf_size) { | |
634 | printk("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", | |
635 | ca->dvbdev->adapter->num, bytes_read, ca->slot_info[slot].link_buf_size); | |
636 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
637 | status = -EIO; | |
638 | goto exit; | |
639 | } | |
640 | if (bytes_read < 2) { | |
641 | printk("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", | |
642 | ca->dvbdev->adapter->num); | |
643 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
644 | status = -EIO; | |
645 | goto exit; | |
646 | } | |
647 | } else { | |
648 | if (bytes_read > ecount) { | |
649 | printk("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", | |
650 | ca->dvbdev->adapter->num); | |
651 | status = -EIO; | |
652 | goto exit; | |
653 | } | |
654 | } | |
655 | ||
656 | /* fill the buffer */ | |
657 | for (i = 0; i < bytes_read; i++) { | |
658 | /* read byte and check */ | |
659 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_DATA)) < 0) | |
660 | goto exit; | |
661 | ||
662 | /* OK, store it in the buffer */ | |
663 | buf[i] = status; | |
664 | } | |
665 | ||
666 | /* check for read error (RE should now be 0) */ | |
667 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
668 | goto exit; | |
669 | if (status & STATUSREG_RE) { | |
670 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
671 | status = -EIO; | |
672 | goto exit; | |
673 | } | |
674 | ||
675 | /* OK, add it to the receive buffer, or copy into external buffer if supplied */ | |
676 | if (ebuf == NULL) { | |
1da177e4 | 677 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
678 | status = -EIO; |
679 | goto exit; | |
680 | } | |
681 | dvb_ringbuffer_pkt_write(&ca->slot_info[slot].rx_buffer, buf, bytes_read); | |
1da177e4 LT |
682 | } else { |
683 | memcpy(ebuf, buf, bytes_read); | |
684 | } | |
685 | ||
686 | dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
687 | buf[0], (buf[1] & 0x80) == 0, bytes_read); | |
688 | ||
689 | /* wake up readers when a last_fragment is received */ | |
690 | if ((buf[1] & 0x80) == 0x00) { | |
691 | wake_up_interruptible(&ca->wait_queue); | |
692 | } | |
693 | status = bytes_read; | |
694 | ||
695 | exit: | |
696 | return status; | |
697 | } | |
698 | ||
699 | ||
700 | /** | |
701 | * This function talks to an EN50221 CAM control interface. It writes a buffer of data | |
702 | * to a CAM. | |
703 | * | |
704 | * @param ca CA instance. | |
705 | * @param slot Slot to write to. | |
706 | * @param ebuf The data in this buffer is treated as a complete link-level packet to | |
707 | * be written. | |
708 | * @param count Size of ebuf. | |
709 | * | |
710 | * @return Number of bytes written, or < 0 on error. | |
711 | */ | |
712 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 * buf, int bytes_write) | |
713 | { | |
714 | int status; | |
715 | int i; | |
716 | ||
717 | dprintk("%s\n", __FUNCTION__); | |
718 | ||
719 | ||
720 | // sanity check | |
721 | if (bytes_write > ca->slot_info[slot].link_buf_size) | |
722 | return -EINVAL; | |
723 | ||
724 | /* check if interface is actually waiting for us to read from it, or if a read is in progress */ | |
725 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
726 | goto exitnowrite; | |
727 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
728 | status = -EAGAIN; | |
729 | goto exitnowrite; | |
730 | } | |
731 | ||
732 | /* OK, set HC bit */ | |
733 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, | |
734 | IRQEN | CMDREG_HC)) != 0) | |
735 | goto exit; | |
736 | ||
737 | /* check if interface is still free */ | |
738 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
739 | goto exit; | |
740 | if (!(status & STATUSREG_FR)) { | |
741 | /* it wasn't free => try again later */ | |
742 | status = -EAGAIN; | |
743 | goto exit; | |
744 | } | |
745 | ||
746 | /* send the amount of data */ | |
747 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, bytes_write >> 8)) != 0) | |
748 | goto exit; | |
749 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, | |
750 | bytes_write & 0xff)) != 0) | |
751 | goto exit; | |
752 | ||
753 | /* send the buffer */ | |
754 | for (i = 0; i < bytes_write; i++) { | |
755 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, buf[i])) != 0) | |
756 | goto exit; | |
757 | } | |
758 | ||
759 | /* check for write error (WE should now be 0) */ | |
760 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
761 | goto exit; | |
762 | if (status & STATUSREG_WE) { | |
763 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
764 | status = -EIO; | |
765 | goto exit; | |
766 | } | |
767 | status = bytes_write; | |
768 | ||
769 | dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
770 | buf[0], (buf[1] & 0x80) == 0, bytes_write); | |
771 | ||
772 | exit: | |
773 | ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); | |
774 | ||
775 | exitnowrite: | |
776 | return status; | |
777 | } | |
778 | EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); | |
779 | ||
780 | ||
781 | ||
782 | /* ******************************************************************************** */ | |
783 | /* EN50221 higher level functions */ | |
784 | ||
785 | ||
786 | /** | |
787 | * A CAM has been removed => shut it down. | |
788 | * | |
789 | * @param ca CA instance. | |
790 | * @param slot Slot to shut down. | |
791 | */ | |
792 | static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) | |
793 | { | |
794 | dprintk("%s\n", __FUNCTION__); | |
795 | ||
1da177e4 LT |
796 | ca->pub->slot_shutdown(ca->pub, slot); |
797 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1da177e4 LT |
798 | |
799 | /* need to wake up all processes to check if they're now | |
800 | trying to write to a defunct CAM */ | |
801 | wake_up_interruptible(&ca->wait_queue); | |
802 | ||
803 | dprintk("Slot %i shutdown\n", slot); | |
804 | ||
805 | /* success */ | |
806 | return 0; | |
807 | } | |
808 | EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); | |
809 | ||
810 | ||
811 | /** | |
812 | * A CAMCHANGE IRQ has occurred. | |
813 | * | |
814 | * @param ca CA instance. | |
815 | * @param slot Slot concerned. | |
816 | * @param change_type One of the DVB_CA_CAMCHANGE_* values. | |
817 | */ | |
818 | void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, int change_type) | |
819 | { | |
0c53c70f | 820 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
821 | |
822 | dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); | |
823 | ||
824 | switch (change_type) { | |
825 | case DVB_CA_EN50221_CAMCHANGE_REMOVED: | |
826 | case DVB_CA_EN50221_CAMCHANGE_INSERTED: | |
827 | break; | |
828 | ||
829 | default: | |
830 | return; | |
831 | } | |
832 | ||
833 | ca->slot_info[slot].camchange_type = change_type; | |
834 | atomic_inc(&ca->slot_info[slot].camchange_count); | |
835 | dvb_ca_en50221_thread_wakeup(ca); | |
836 | } | |
837 | EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); | |
838 | ||
839 | ||
840 | /** | |
841 | * A CAMREADY IRQ has occurred. | |
842 | * | |
843 | * @param ca CA instance. | |
844 | * @param slot Slot concerned. | |
845 | */ | |
846 | void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) | |
847 | { | |
0c53c70f | 848 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
849 | |
850 | dprintk("CAMREADY IRQ slot:%i\n", slot); | |
851 | ||
852 | if (ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) { | |
853 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
854 | dvb_ca_en50221_thread_wakeup(ca); | |
855 | } | |
856 | } | |
857 | ||
858 | ||
859 | /** | |
860 | * An FR or DA IRQ has occurred. | |
861 | * | |
862 | * @param ca CA instance. | |
863 | * @param slot Slot concerned. | |
864 | */ | |
865 | void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) | |
866 | { | |
0c53c70f | 867 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
868 | int flags; |
869 | ||
870 | dprintk("FR/DA IRQ slot:%i\n", slot); | |
871 | ||
872 | switch (ca->slot_info[slot].slot_state) { | |
873 | case DVB_CA_SLOTSTATE_LINKINIT: | |
874 | flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); | |
875 | if (flags & STATUSREG_DA) { | |
876 | dprintk("CAM supports DA IRQ\n"); | |
877 | ca->slot_info[slot].da_irq_supported = 1; | |
878 | } | |
879 | break; | |
880 | ||
881 | case DVB_CA_SLOTSTATE_RUNNING: | |
882 | if (ca->open) | |
ded92846 | 883 | dvb_ca_en50221_thread_wakeup(ca); |
1da177e4 LT |
884 | break; |
885 | } | |
886 | } | |
887 | ||
888 | ||
889 | ||
890 | /* ******************************************************************************** */ | |
891 | /* EN50221 thread functions */ | |
892 | ||
893 | /** | |
894 | * Wake up the DVB CA thread | |
895 | * | |
896 | * @param ca CA instance. | |
897 | */ | |
898 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) | |
899 | { | |
900 | ||
901 | dprintk("%s\n", __FUNCTION__); | |
902 | ||
903 | ca->wakeup = 1; | |
904 | mb(); | |
905 | wake_up_interruptible(&ca->thread_queue); | |
906 | } | |
907 | ||
908 | /** | |
909 | * Used by the CA thread to determine if an early wakeup is necessary | |
910 | * | |
911 | * @param ca CA instance. | |
912 | */ | |
913 | static int dvb_ca_en50221_thread_should_wakeup(struct dvb_ca_private *ca) | |
914 | { | |
915 | if (ca->wakeup) { | |
916 | ca->wakeup = 0; | |
917 | return 1; | |
918 | } | |
919 | if (ca->exit) | |
920 | return 1; | |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
925 | ||
926 | /** | |
927 | * Update the delay used by the thread. | |
928 | * | |
929 | * @param ca CA instance. | |
930 | */ | |
931 | static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) | |
932 | { | |
933 | int delay; | |
934 | int curdelay = 100000000; | |
935 | int slot; | |
936 | ||
937 | for (slot = 0; slot < ca->slot_count; slot++) { | |
938 | switch (ca->slot_info[slot].slot_state) { | |
939 | default: | |
940 | case DVB_CA_SLOTSTATE_NONE: | |
941 | case DVB_CA_SLOTSTATE_INVALID: | |
942 | delay = HZ * 60; | |
943 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) { | |
944 | delay = HZ / 10; | |
945 | } | |
946 | break; | |
947 | ||
948 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
949 | case DVB_CA_SLOTSTATE_WAITREADY: | |
950 | case DVB_CA_SLOTSTATE_VALIDATE: | |
951 | case DVB_CA_SLOTSTATE_WAITFR: | |
952 | case DVB_CA_SLOTSTATE_LINKINIT: | |
953 | delay = HZ / 10; | |
954 | break; | |
955 | ||
956 | case DVB_CA_SLOTSTATE_RUNNING: | |
957 | delay = HZ * 60; | |
958 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) { | |
959 | delay = HZ / 10; | |
960 | } | |
961 | if (ca->open) { | |
962 | if ((!ca->slot_info[slot].da_irq_supported) || | |
963 | (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) { | |
964 | delay = HZ / 10; | |
965 | } | |
966 | } | |
967 | break; | |
968 | } | |
969 | ||
970 | if (delay < curdelay) | |
971 | curdelay = delay; | |
972 | } | |
973 | ||
974 | ca->delay = curdelay; | |
975 | } | |
976 | ||
977 | ||
978 | ||
979 | /** | |
980 | * Kernel thread which monitors CA slots for CAM changes, and performs data transfers. | |
981 | */ | |
982 | static int dvb_ca_en50221_thread(void *data) | |
983 | { | |
0c53c70f | 984 | struct dvb_ca_private *ca = data; |
1da177e4 LT |
985 | char name[15]; |
986 | int slot; | |
987 | int flags; | |
988 | int status; | |
989 | int pktcount; | |
990 | void *rxbuf; | |
991 | ||
992 | dprintk("%s\n", __FUNCTION__); | |
993 | ||
994 | /* setup kernel thread */ | |
995 | snprintf(name, sizeof(name), "kdvb-ca-%i:%i", ca->dvbdev->adapter->num, ca->dvbdev->id); | |
996 | ||
997 | lock_kernel(); | |
998 | daemonize(name); | |
999 | sigfillset(¤t->blocked); | |
1000 | unlock_kernel(); | |
1001 | ||
1002 | /* choose the correct initial delay */ | |
1003 | dvb_ca_en50221_thread_update_delay(ca); | |
1004 | ||
1005 | /* main loop */ | |
1006 | while (!ca->exit) { | |
1007 | /* sleep for a bit */ | |
1008 | if (!ca->wakeup) { | |
1009 | flags = wait_event_interruptible_timeout(ca->thread_queue, | |
1010 | dvb_ca_en50221_thread_should_wakeup(ca), | |
1011 | ca->delay); | |
1012 | if ((flags == -ERESTARTSYS) || ca->exit) { | |
1013 | /* got signal or quitting */ | |
1014 | break; | |
1015 | } | |
1016 | } | |
1017 | ca->wakeup = 0; | |
1018 | ||
1019 | /* go through all the slots processing them */ | |
1020 | for (slot = 0; slot < ca->slot_count; slot++) { | |
1021 | ||
1022 | // check the cam status + deal with CAMCHANGEs | |
1023 | while (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1024 | /* clear down an old CI slot if necessary */ | |
1025 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) | |
1026 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1027 | ||
1028 | /* if a CAM is NOW present, initialise it */ | |
1029 | if (ca->slot_info[slot].camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) { | |
1030 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1031 | } | |
1032 | ||
1033 | /* we've handled one CAMCHANGE */ | |
1034 | dvb_ca_en50221_thread_update_delay(ca); | |
1035 | atomic_dec(&ca->slot_info[slot].camchange_count); | |
1036 | } | |
1037 | ||
1038 | // CAM state machine | |
1039 | switch (ca->slot_info[slot].slot_state) { | |
1040 | case DVB_CA_SLOTSTATE_NONE: | |
1041 | case DVB_CA_SLOTSTATE_INVALID: | |
1042 | // no action needed | |
1043 | break; | |
1044 | ||
1045 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
1046 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITREADY; | |
1047 | ca->pub->slot_reset(ca->pub, slot); | |
1048 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1049 | break; | |
1050 | ||
1051 | case DVB_CA_SLOTSTATE_WAITREADY: | |
1052 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { | |
1053 | printk("dvb_ca adaptor %d: PC card did not respond :(\n", | |
1054 | ca->dvbdev->adapter->num); | |
1055 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1056 | dvb_ca_en50221_thread_update_delay(ca); | |
1057 | break; | |
1058 | } | |
1059 | // no other action needed; will automatically change state when ready | |
1060 | break; | |
1061 | ||
1062 | case DVB_CA_SLOTSTATE_VALIDATE: | |
5c1208ba AQ |
1063 | if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { |
1064 | /* we need this extra check for annoying interfaces like the budget-av */ | |
1065 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1066 | (ca->pub->poll_slot_status)) { | |
1067 | int status = ca->pub->poll_slot_status(ca->pub, slot, 0); | |
1068 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { | |
1069 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1070 | dvb_ca_en50221_thread_update_delay(ca); | |
1071 | break; | |
1072 | } | |
1073 | } | |
1074 | ||
1da177e4 LT |
1075 | printk("dvb_ca adapter %d: Invalid PC card inserted :(\n", |
1076 | ca->dvbdev->adapter->num); | |
1077 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1078 | dvb_ca_en50221_thread_update_delay(ca); | |
1079 | break; | |
1080 | } | |
1081 | if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { | |
1082 | printk("dvb_ca adapter %d: Unable to initialise CAM :(\n", | |
1083 | ca->dvbdev->adapter->num); | |
1084 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1085 | dvb_ca_en50221_thread_update_delay(ca); | |
1086 | break; | |
1087 | } | |
1088 | if (ca->pub->write_cam_control(ca->pub, slot, | |
1089 | CTRLIF_COMMAND, CMDREG_RS) != 0) { | |
1090 | printk("dvb_ca adapter %d: Unable to reset CAM IF\n", | |
1091 | ca->dvbdev->adapter->num); | |
1092 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1093 | dvb_ca_en50221_thread_update_delay(ca); | |
1094 | break; | |
1095 | } | |
1096 | dprintk("DVB CAM validated successfully\n"); | |
1097 | ||
1098 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1099 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITFR; | |
1100 | ca->wakeup = 1; | |
1101 | break; | |
1102 | ||
1103 | case DVB_CA_SLOTSTATE_WAITFR: | |
1104 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { | |
1105 | printk("dvb_ca adapter %d: DVB CAM did not respond :(\n", | |
1106 | ca->dvbdev->adapter->num); | |
1107 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1108 | dvb_ca_en50221_thread_update_delay(ca); | |
1109 | break; | |
1110 | } | |
1111 | ||
1112 | flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
1113 | if (flags & STATUSREG_FR) { | |
1114 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
1115 | ca->wakeup = 1; | |
1116 | } | |
1117 | break; | |
1118 | ||
1119 | case DVB_CA_SLOTSTATE_LINKINIT: | |
1120 | if (dvb_ca_en50221_link_init(ca, slot) != 0) { | |
5c1208ba AQ |
1121 | /* we need this extra check for annoying interfaces like the budget-av */ |
1122 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1123 | (ca->pub->poll_slot_status)) { | |
1124 | int status = ca->pub->poll_slot_status(ca->pub, slot, 0); | |
1125 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { | |
1126 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1127 | dvb_ca_en50221_thread_update_delay(ca); | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | ||
1da177e4 LT |
1132 | printk("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", ca->dvbdev->adapter->num); |
1133 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1134 | dvb_ca_en50221_thread_update_delay(ca); | |
1135 | break; | |
1136 | } | |
1137 | ||
ded92846 AQ |
1138 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1139 | rxbuf = vmalloc(RX_BUFFER_SIZE); | |
1140 | if (rxbuf == NULL) { | |
1141 | printk("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", ca->dvbdev->adapter->num); | |
1142 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1143 | dvb_ca_en50221_thread_update_delay(ca); | |
1144 | break; | |
1145 | } | |
1146 | dvb_ringbuffer_init(&ca->slot_info[slot].rx_buffer, rxbuf, RX_BUFFER_SIZE); | |
1da177e4 | 1147 | } |
1da177e4 LT |
1148 | |
1149 | ca->pub->slot_ts_enable(ca->pub, slot); | |
1150 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_RUNNING; | |
1151 | dvb_ca_en50221_thread_update_delay(ca); | |
1152 | printk("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", ca->dvbdev->adapter->num); | |
1153 | break; | |
1154 | ||
1155 | case DVB_CA_SLOTSTATE_RUNNING: | |
1156 | if (!ca->open) | |
1157 | continue; | |
1158 | ||
ded92846 | 1159 | // poll slots for data |
1da177e4 LT |
1160 | pktcount = 0; |
1161 | while ((status = dvb_ca_en50221_read_data(ca, slot, NULL, 0)) > 0) { | |
1162 | if (!ca->open) | |
1163 | break; | |
1164 | ||
1165 | /* if a CAMCHANGE occurred at some point, do not do any more processing of this slot */ | |
1166 | if (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1167 | // we dont want to sleep on the next iteration so we can handle the cam change | |
1168 | ca->wakeup = 1; | |
1169 | break; | |
1170 | } | |
1171 | ||
1172 | /* check if we've hit our limit this time */ | |
1173 | if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { | |
1174 | // dont sleep; there is likely to be more data to read | |
1175 | ca->wakeup = 1; | |
1176 | break; | |
1177 | } | |
1178 | } | |
1179 | break; | |
1180 | } | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | /* completed */ | |
1185 | ca->thread_pid = 0; | |
1186 | mb(); | |
1187 | wake_up_interruptible(&ca->thread_queue); | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | ||
1192 | ||
1193 | /* ******************************************************************************** */ | |
1194 | /* EN50221 IO interface functions */ | |
1195 | ||
1196 | /** | |
1197 | * Real ioctl implementation. | |
1198 | * NOTE: CA_SEND_MSG/CA_GET_MSG ioctls have userspace buffers passed to them. | |
1199 | * | |
1200 | * @param inode Inode concerned. | |
1201 | * @param file File concerned. | |
1202 | * @param cmd IOCTL command. | |
1203 | * @param arg Associated argument. | |
1204 | * | |
1205 | * @return 0 on success, <0 on error. | |
1206 | */ | |
1207 | static int dvb_ca_en50221_io_do_ioctl(struct inode *inode, struct file *file, | |
1208 | unsigned int cmd, void *parg) | |
1209 | { | |
0c53c70f JS |
1210 | struct dvb_device *dvbdev = file->private_data; |
1211 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1212 | int err = 0; |
1213 | int slot; | |
1214 | ||
1215 | dprintk("%s\n", __FUNCTION__); | |
1216 | ||
1217 | switch (cmd) { | |
1218 | case CA_RESET: | |
1219 | for (slot = 0; slot < ca->slot_count; slot++) { | |
1220 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) { | |
1221 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1222 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) | |
1223 | dvb_ca_en50221_camchange_irq(ca->pub, | |
1224 | slot, | |
1225 | DVB_CA_EN50221_CAMCHANGE_INSERTED); | |
1226 | } | |
1227 | } | |
1228 | ca->next_read_slot = 0; | |
1229 | dvb_ca_en50221_thread_wakeup(ca); | |
1230 | break; | |
1231 | ||
1232 | case CA_GET_CAP: { | |
0c53c70f | 1233 | struct ca_caps *caps = parg; |
1da177e4 LT |
1234 | |
1235 | caps->slot_num = ca->slot_count; | |
1236 | caps->slot_type = CA_CI_LINK; | |
1237 | caps->descr_num = 0; | |
1238 | caps->descr_type = 0; | |
1239 | break; | |
1240 | } | |
1241 | ||
1242 | case CA_GET_SLOT_INFO: { | |
0c53c70f | 1243 | struct ca_slot_info *info = parg; |
1da177e4 LT |
1244 | |
1245 | if ((info->num > ca->slot_count) || (info->num < 0)) | |
1246 | return -EINVAL; | |
1247 | ||
1248 | info->type = CA_CI_LINK; | |
1249 | info->flags = 0; | |
1250 | if ((ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_NONE) | |
1251 | && (ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_INVALID)) { | |
1252 | info->flags = CA_CI_MODULE_PRESENT; | |
1253 | } | |
1254 | if (ca->slot_info[info->num].slot_state == DVB_CA_SLOTSTATE_RUNNING) { | |
1255 | info->flags |= CA_CI_MODULE_READY; | |
1256 | } | |
1257 | break; | |
1258 | } | |
1259 | ||
1260 | default: | |
1261 | err = -EINVAL; | |
1262 | break; | |
1263 | } | |
1264 | ||
1265 | return err; | |
1266 | } | |
1267 | ||
1268 | ||
1269 | /** | |
1270 | * Wrapper for ioctl implementation. | |
1271 | * | |
1272 | * @param inode Inode concerned. | |
1273 | * @param file File concerned. | |
1274 | * @param cmd IOCTL command. | |
1275 | * @param arg Associated argument. | |
1276 | * | |
1277 | * @return 0 on success, <0 on error. | |
1278 | */ | |
1279 | static int dvb_ca_en50221_io_ioctl(struct inode *inode, struct file *file, | |
1280 | unsigned int cmd, unsigned long arg) | |
1281 | { | |
1282 | return dvb_usercopy(inode, file, cmd, arg, dvb_ca_en50221_io_do_ioctl); | |
1283 | } | |
1284 | ||
1285 | ||
1286 | /** | |
1287 | * Implementation of write() syscall. | |
1288 | * | |
1289 | * @param file File structure. | |
1290 | * @param buf Source buffer. | |
1291 | * @param count Size of source buffer. | |
1292 | * @param ppos Position in file (ignored). | |
1293 | * | |
1294 | * @return Number of bytes read, or <0 on error. | |
1295 | */ | |
1296 | static ssize_t dvb_ca_en50221_io_write(struct file *file, | |
1297 | const char __user * buf, size_t count, loff_t * ppos) | |
1298 | { | |
0c53c70f JS |
1299 | struct dvb_device *dvbdev = file->private_data; |
1300 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1301 | u8 slot, connection_id; |
1302 | int status; | |
1303 | char fragbuf[HOST_LINK_BUF_SIZE]; | |
1304 | int fragpos = 0; | |
1305 | int fraglen; | |
1306 | unsigned long timeout; | |
1307 | int written; | |
1308 | ||
1309 | dprintk("%s\n", __FUNCTION__); | |
1310 | ||
1311 | /* Incoming packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ | |
1312 | if (count < 2) | |
1313 | return -EINVAL; | |
1314 | ||
1315 | /* extract slot & connection id */ | |
1316 | if (copy_from_user(&slot, buf, 1)) | |
1317 | return -EFAULT; | |
1318 | if (copy_from_user(&connection_id, buf + 1, 1)) | |
1319 | return -EFAULT; | |
1320 | buf += 2; | |
1321 | count -= 2; | |
1322 | ||
1323 | /* check if the slot is actually running */ | |
1324 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1325 | return -EINVAL; | |
1326 | ||
1327 | /* fragment the packets & store in the buffer */ | |
1328 | while (fragpos < count) { | |
1329 | fraglen = ca->slot_info[slot].link_buf_size - 2; | |
1330 | if ((count - fragpos) < fraglen) | |
1331 | fraglen = count - fragpos; | |
1332 | ||
1333 | fragbuf[0] = connection_id; | |
1334 | fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00; | |
1335 | if ((status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen)) != 0) | |
1336 | goto exit; | |
1337 | ||
1338 | timeout = jiffies + HZ / 2; | |
1339 | written = 0; | |
1340 | while (!time_after(jiffies, timeout)) { | |
1341 | /* check the CAM hasn't been removed/reset in the meantime */ | |
1342 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) { | |
1343 | status = -EIO; | |
1344 | goto exit; | |
1345 | } | |
1346 | ||
1347 | status = dvb_ca_en50221_write_data(ca, slot, fragbuf, fraglen + 2); | |
1348 | if (status == (fraglen + 2)) { | |
1349 | written = 1; | |
1350 | break; | |
1351 | } | |
1352 | if (status != -EAGAIN) | |
1353 | goto exit; | |
1354 | ||
1355 | msleep(1); | |
1356 | } | |
1357 | if (!written) { | |
1358 | status = -EIO; | |
1359 | goto exit; | |
1360 | } | |
1361 | ||
1362 | fragpos += fraglen; | |
1363 | } | |
1364 | status = count + 2; | |
1365 | ||
1366 | exit: | |
1367 | return status; | |
1368 | } | |
1369 | ||
1370 | ||
1371 | /** | |
1372 | * Condition for waking up in dvb_ca_en50221_io_read_condition | |
1373 | */ | |
ded92846 AQ |
1374 | static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, |
1375 | int *result, int *_slot) | |
1da177e4 LT |
1376 | { |
1377 | int slot; | |
1378 | int slot_count = 0; | |
1379 | int idx; | |
ded92846 | 1380 | size_t fraglen; |
1da177e4 LT |
1381 | int connection_id = -1; |
1382 | int found = 0; | |
1383 | u8 hdr[2]; | |
1384 | ||
1385 | slot = ca->next_read_slot; | |
1386 | while ((slot_count < ca->slot_count) && (!found)) { | |
1387 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1388 | goto nextslot; | |
1389 | ||
1da177e4 | 1390 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
1391 | return 0; |
1392 | } | |
1393 | ||
1394 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); | |
1395 | while (idx != -1) { | |
1396 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2, 0); | |
1397 | if (connection_id == -1) | |
1398 | connection_id = hdr[0]; | |
1399 | if ((hdr[0] == connection_id) && ((hdr[1] & 0x80) == 0)) { | |
1400 | *_slot = slot; | |
1401 | found = 1; | |
1402 | break; | |
1403 | } | |
1404 | ||
1405 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); | |
1406 | } | |
1407 | ||
ded92846 | 1408 | nextslot: |
1da177e4 LT |
1409 | slot = (slot + 1) % ca->slot_count; |
1410 | slot_count++; | |
1411 | } | |
1412 | ||
1413 | ca->next_read_slot = slot; | |
1414 | return found; | |
1415 | } | |
1416 | ||
1417 | ||
1418 | /** | |
1419 | * Implementation of read() syscall. | |
1420 | * | |
1421 | * @param file File structure. | |
1422 | * @param buf Destination buffer. | |
1423 | * @param count Size of destination buffer. | |
1424 | * @param ppos Position in file (ignored). | |
1425 | * | |
1426 | * @return Number of bytes read, or <0 on error. | |
1427 | */ | |
1428 | static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user * buf, | |
1429 | size_t count, loff_t * ppos) | |
1430 | { | |
0c53c70f JS |
1431 | struct dvb_device *dvbdev = file->private_data; |
1432 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1433 | int status; |
1434 | int result = 0; | |
1435 | u8 hdr[2]; | |
1436 | int slot; | |
1437 | int connection_id = -1; | |
1438 | size_t idx, idx2; | |
1439 | int last_fragment = 0; | |
1440 | size_t fraglen; | |
1441 | int pktlen; | |
1442 | int dispose = 0; | |
1443 | ||
1444 | dprintk("%s\n", __FUNCTION__); | |
1445 | ||
1446 | /* Outgoing packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ | |
1447 | if (count < 2) | |
1448 | return -EINVAL; | |
1449 | ||
1450 | /* wait for some data */ | |
1451 | if ((status = dvb_ca_en50221_io_read_condition(ca, &result, &slot)) == 0) { | |
1452 | ||
1453 | /* if we're in nonblocking mode, exit immediately */ | |
1454 | if (file->f_flags & O_NONBLOCK) | |
1455 | return -EWOULDBLOCK; | |
1456 | ||
1457 | /* wait for some data */ | |
1458 | status = wait_event_interruptible(ca->wait_queue, | |
1459 | dvb_ca_en50221_io_read_condition | |
1460 | (ca, &result, &slot)); | |
1461 | } | |
1462 | if ((status < 0) || (result < 0)) { | |
1463 | if (result) | |
1464 | return result; | |
1465 | return status; | |
1466 | } | |
1467 | ||
1468 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); | |
1469 | pktlen = 2; | |
1470 | do { | |
1471 | if (idx == -1) { | |
1472 | printk("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n", ca->dvbdev->adapter->num); | |
1473 | status = -EIO; | |
1474 | goto exit; | |
1475 | } | |
1476 | ||
1477 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2, 0); | |
1478 | if (connection_id == -1) | |
1479 | connection_id = hdr[0]; | |
1480 | if (hdr[0] == connection_id) { | |
1481 | if (pktlen < count) { | |
1482 | if ((pktlen + fraglen - 2) > count) { | |
1483 | fraglen = count - pktlen; | |
1484 | } else { | |
1485 | fraglen -= 2; | |
1486 | } | |
1487 | ||
1488 | if ((status = dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 2, | |
1489 | buf + pktlen, fraglen, 1)) < 0) { | |
1490 | goto exit; | |
1491 | } | |
1492 | pktlen += fraglen; | |
1493 | } | |
1494 | ||
1495 | if ((hdr[1] & 0x80) == 0) | |
1496 | last_fragment = 1; | |
1497 | dispose = 1; | |
1498 | } | |
1499 | ||
1500 | idx2 = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); | |
1501 | if (dispose) | |
1502 | dvb_ringbuffer_pkt_dispose(&ca->slot_info[slot].rx_buffer, idx); | |
1503 | idx = idx2; | |
1504 | dispose = 0; | |
1505 | } while (!last_fragment); | |
1506 | ||
1507 | hdr[0] = slot; | |
1508 | hdr[1] = connection_id; | |
1509 | if ((status = copy_to_user(buf, hdr, 2)) != 0) | |
1510 | goto exit; | |
1511 | status = pktlen; | |
1512 | ||
ded92846 | 1513 | exit: |
1da177e4 LT |
1514 | return status; |
1515 | } | |
1516 | ||
1517 | ||
1518 | /** | |
1519 | * Implementation of file open syscall. | |
1520 | * | |
1521 | * @param inode Inode concerned. | |
1522 | * @param file File concerned. | |
1523 | * | |
1524 | * @return 0 on success, <0 on failure. | |
1525 | */ | |
1526 | static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) | |
1527 | { | |
0c53c70f JS |
1528 | struct dvb_device *dvbdev = file->private_data; |
1529 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1530 | int err; |
1531 | int i; | |
1532 | ||
1533 | dprintk("%s\n", __FUNCTION__); | |
1534 | ||
1535 | if (!try_module_get(ca->pub->owner)) | |
1536 | return -EIO; | |
1537 | ||
1538 | err = dvb_generic_open(inode, file); | |
1539 | if (err < 0) | |
1540 | return err; | |
1541 | ||
1542 | for (i = 0; i < ca->slot_count; i++) { | |
1543 | ||
1544 | if (ca->slot_info[i].slot_state == DVB_CA_SLOTSTATE_RUNNING) { | |
1da177e4 | 1545 | if (ca->slot_info[i].rx_buffer.data != NULL) { |
ded92846 AQ |
1546 | /* it is safe to call this here without locks because |
1547 | * ca->open == 0. Data is not read in this case */ | |
1da177e4 LT |
1548 | dvb_ringbuffer_flush(&ca->slot_info[i].rx_buffer); |
1549 | } | |
1da177e4 LT |
1550 | } |
1551 | } | |
1552 | ||
1553 | ca->open = 1; | |
1554 | dvb_ca_en50221_thread_update_delay(ca); | |
1555 | dvb_ca_en50221_thread_wakeup(ca); | |
1556 | ||
1557 | return 0; | |
1558 | } | |
1559 | ||
1560 | ||
1561 | /** | |
1562 | * Implementation of file close syscall. | |
1563 | * | |
1564 | * @param inode Inode concerned. | |
1565 | * @param file File concerned. | |
1566 | * | |
1567 | * @return 0 on success, <0 on failure. | |
1568 | */ | |
1569 | static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) | |
1570 | { | |
0c53c70f JS |
1571 | struct dvb_device *dvbdev = file->private_data; |
1572 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1573 | int err = 0; |
1574 | ||
1575 | dprintk("%s\n", __FUNCTION__); | |
1576 | ||
1577 | /* mark the CA device as closed */ | |
1578 | ca->open = 0; | |
1579 | dvb_ca_en50221_thread_update_delay(ca); | |
1580 | ||
1581 | err = dvb_generic_release(inode, file); | |
1582 | ||
1583 | module_put(ca->pub->owner); | |
1584 | ||
1585 | return 0; | |
1586 | } | |
1587 | ||
1588 | ||
1589 | /** | |
1590 | * Implementation of poll() syscall. | |
1591 | * | |
1592 | * @param file File concerned. | |
1593 | * @param wait poll wait table. | |
1594 | * | |
1595 | * @return Standard poll mask. | |
1596 | */ | |
1597 | static unsigned int dvb_ca_en50221_io_poll(struct file *file, poll_table * wait) | |
1598 | { | |
0c53c70f JS |
1599 | struct dvb_device *dvbdev = file->private_data; |
1600 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1601 | unsigned int mask = 0; |
1602 | int slot; | |
1603 | int result = 0; | |
1604 | ||
1605 | dprintk("%s\n", __FUNCTION__); | |
1606 | ||
1607 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { | |
1da177e4 LT |
1608 | mask |= POLLIN; |
1609 | } | |
1610 | ||
1611 | /* if there is something, return now */ | |
1612 | if (mask) | |
1613 | return mask; | |
1614 | ||
1615 | /* wait for something to happen */ | |
1616 | poll_wait(file, &ca->wait_queue, wait); | |
1617 | ||
1618 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { | |
1da177e4 LT |
1619 | mask |= POLLIN; |
1620 | } | |
1621 | ||
1622 | return mask; | |
1623 | } | |
1624 | EXPORT_SYMBOL(dvb_ca_en50221_init); | |
1625 | ||
1626 | ||
1627 | static struct file_operations dvb_ca_fops = { | |
1628 | .owner = THIS_MODULE, | |
1629 | .read = dvb_ca_en50221_io_read, | |
1630 | .write = dvb_ca_en50221_io_write, | |
1631 | .ioctl = dvb_ca_en50221_io_ioctl, | |
1632 | .open = dvb_ca_en50221_io_open, | |
1633 | .release = dvb_ca_en50221_io_release, | |
1634 | .poll = dvb_ca_en50221_io_poll, | |
1635 | }; | |
1636 | ||
1637 | static struct dvb_device dvbdev_ca = { | |
1638 | .priv = NULL, | |
1639 | .users = 1, | |
1640 | .readers = 1, | |
1641 | .writers = 1, | |
1642 | .fops = &dvb_ca_fops, | |
1643 | }; | |
1644 | ||
1645 | ||
1646 | /* ******************************************************************************** */ | |
1647 | /* Initialisation/shutdown functions */ | |
1648 | ||
1649 | ||
1650 | /** | |
1651 | * Initialise a new DVB CA EN50221 interface device. | |
1652 | * | |
1653 | * @param dvb_adapter DVB adapter to attach the new CA device to. | |
1654 | * @param ca The dvb_ca instance. | |
1655 | * @param flags Flags describing the CA device (DVB_CA_FLAG_*). | |
1656 | * @param slot_count Number of slots supported. | |
1657 | * | |
1658 | * @return 0 on success, nonzero on failure | |
1659 | */ | |
1660 | int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, | |
1661 | struct dvb_ca_en50221 *pubca, int flags, int slot_count) | |
1662 | { | |
1663 | int ret; | |
1664 | struct dvb_ca_private *ca = NULL; | |
1665 | int i; | |
1666 | ||
1667 | dprintk("%s\n", __FUNCTION__); | |
1668 | ||
1669 | if (slot_count < 1) | |
1670 | return -EINVAL; | |
1671 | ||
1672 | /* initialise the system data */ | |
7408187d | 1673 | if ((ca = kzalloc(sizeof(struct dvb_ca_private), GFP_KERNEL)) == NULL) { |
1da177e4 LT |
1674 | ret = -ENOMEM; |
1675 | goto error; | |
1676 | } | |
1da177e4 LT |
1677 | ca->pub = pubca; |
1678 | ca->flags = flags; | |
1679 | ca->slot_count = slot_count; | |
7408187d | 1680 | if ((ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), GFP_KERNEL)) == NULL) { |
1da177e4 LT |
1681 | ret = -ENOMEM; |
1682 | goto error; | |
1683 | } | |
1da177e4 LT |
1684 | init_waitqueue_head(&ca->wait_queue); |
1685 | ca->thread_pid = 0; | |
1686 | init_waitqueue_head(&ca->thread_queue); | |
1687 | ca->exit = 0; | |
1688 | ca->open = 0; | |
1689 | ca->wakeup = 0; | |
1690 | ca->next_read_slot = 0; | |
1691 | pubca->private = ca; | |
1692 | ||
1693 | /* register the DVB device */ | |
1694 | ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, DVB_DEVICE_CA); | |
1695 | if (ret) | |
1696 | goto error; | |
1697 | ||
1698 | /* now initialise each slot */ | |
1699 | for (i = 0; i < slot_count; i++) { | |
1700 | memset(&ca->slot_info[i], 0, sizeof(struct dvb_ca_slot)); | |
1701 | ca->slot_info[i].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1702 | atomic_set(&ca->slot_info[i].camchange_count, 0); | |
1703 | ca->slot_info[i].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
1da177e4 LT |
1704 | } |
1705 | ||
1706 | if (signal_pending(current)) { | |
1707 | ret = -EINTR; | |
1708 | goto error; | |
1709 | } | |
1710 | mb(); | |
1711 | ||
1712 | /* create a kthread for monitoring this CA device */ | |
1713 | ||
1714 | ret = kernel_thread(dvb_ca_en50221_thread, ca, 0); | |
1715 | ||
1716 | if (ret < 0) { | |
1717 | printk("dvb_ca_init: failed to start kernel_thread (%d)\n", ret); | |
1718 | goto error; | |
1719 | } | |
1720 | ca->thread_pid = ret; | |
1721 | return 0; | |
1722 | ||
ded92846 | 1723 | error: |
1da177e4 LT |
1724 | if (ca != NULL) { |
1725 | if (ca->dvbdev != NULL) | |
1726 | dvb_unregister_device(ca->dvbdev); | |
1727 | kfree(ca->slot_info); | |
1728 | kfree(ca); | |
1729 | } | |
1730 | pubca->private = NULL; | |
1731 | return ret; | |
1732 | } | |
1733 | EXPORT_SYMBOL(dvb_ca_en50221_release); | |
1734 | ||
1735 | ||
1736 | ||
1737 | /** | |
1738 | * Release a DVB CA EN50221 interface device. | |
1739 | * | |
1740 | * @param ca_dev The dvb_device_t instance for the CA device. | |
1741 | * @param ca The associated dvb_ca instance. | |
1742 | */ | |
1743 | void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) | |
1744 | { | |
0c53c70f | 1745 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
1746 | int i; |
1747 | ||
1748 | dprintk("%s\n", __FUNCTION__); | |
1749 | ||
1750 | /* shutdown the thread if there was one */ | |
1751 | if (ca->thread_pid) { | |
1752 | if (kill_proc(ca->thread_pid, 0, 1) == -ESRCH) { | |
1753 | printk("dvb_ca_release adapter %d: thread PID %d already died\n", | |
1754 | ca->dvbdev->adapter->num, ca->thread_pid); | |
1755 | } else { | |
1756 | ca->exit = 1; | |
1757 | mb(); | |
1758 | dvb_ca_en50221_thread_wakeup(ca); | |
1759 | wait_event_interruptible(ca->thread_queue, ca->thread_pid == 0); | |
1760 | } | |
1761 | } | |
1762 | ||
1763 | for (i = 0; i < ca->slot_count; i++) { | |
1764 | dvb_ca_en50221_slot_shutdown(ca, i); | |
35dc0fef | 1765 | vfree(ca->slot_info[i].rx_buffer.data); |
1da177e4 LT |
1766 | } |
1767 | kfree(ca->slot_info); | |
1768 | dvb_unregister_device(ca->dvbdev); | |
1769 | kfree(ca); | |
1770 | pubca->private = NULL; | |
1771 | } |